การพัฒนาแอพมือถือ: การเพิ่มประสิทธิภาพภาพการนําเสนอสําหรับ iOS และ Android

# Install Aspose.Slides
Install-Package Aspose.Slides.NET

# Target frameworks supported
# - .NET 6.0, 7.0, 8.0
# - .NET Framework 4.0, 4.5, 4.6, 4.7, 4.8
# - .NET Core 3.1

using Aspose.Slides;
using Aspose.Slides.LowCode;
using Aspose.Slides.Export;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

using Aspose.Slides;
using Aspose.Slides.LowCode;
using System;
using System.IO;
using System.Threading.Tasks;

public class EnterpriseConverter
{
    public static async Task<ConversionResult> ConvertPresentation(
        string inputPath, 
        string outputPath, 
        SaveFormat targetFormat)
    {
        var result = new ConversionResult();
        var startTime = DateTime.Now;
        
        try
        {
            // Load and convert
            using (var presentation = new Presentation(inputPath))
            {
                // Get source file info
                result.InputFileSize = new FileInfo(inputPath).Length;
                result.SlideCount = presentation.Slides.Count;
                
                // Perform conversion
                await Task.Run(() => presentation.Save(outputPath, targetFormat));
                
                // Get output file info
                result.OutputFileSize = new FileInfo(outputPath).Length;
                result.Success = true;
            }
        }
        catch (Exception ex)
        {
            result.Success = false;
            result.ErrorMessage = ex.Message;
        }
        
        result.ProcessingTime = DateTime.Now - startTime;
        return result;
    }
}

public class ConversionResult
{
    public bool Success { get; set; }
    public long InputFileSize { get; set; }
    public long OutputFileSize { get; set; }
    public int SlideCount { get; set; }
    public TimeSpan ProcessingTime { get; set; }
    public string ErrorMessage { get; set; }
}

using System.Collections.Concurrent;
using System.Diagnostics;

public class ParallelBatchConverter
{
    public static async Task<BatchResult> ConvertBatchAsync(
        string[] files, 
        string outputDir,
        int maxParallelism = 4)
    {
        var results = new ConcurrentBag<ConversionResult>();
        var stopwatch = Stopwatch.StartNew();
        
        var options = new ParallelOptions 
        { 
            MaxDegreeOfParallelism = maxParallelism 
        };
        
        await Parallel.ForEachAsync(files, options, async (file, ct) =>
        {
            var outputFile = Path.Combine(outputDir, 
                Path.GetFileNameWithoutExtension(file) + ".pptx");
            
            var result = await ConvertPresentation(file, outputFile, SaveFormat.Pptx);
            results.Add(result);
            
            // Progress reporting
            Console.WriteLine($"Processed: {Path.GetFileName(file)} - " +
                            $"{(result.Success ? "✓" : "✗")}");
        });
        
        stopwatch.Stop();
        
        return new BatchResult
        {
            TotalFiles = files.Length,
            SuccessCount = results.Count(r => r.Success),
            FailedCount = results.Count(r => !r.Success),
            TotalTime = stopwatch.Elapsed,
            AverageTime = TimeSpan.FromMilliseconds(
                stopwatch.Elapsed.TotalMilliseconds / files.Length)
        };
    }
}

using Azure.Storage.Blobs;

public class CloudProcessor
{
    private readonly BlobContainerClient _container;
    
    public CloudProcessor(string connectionString, string containerName)
    {
        _container = new BlobContainerClient(connectionString, containerName);
    }
    
    public async Task ProcessFromCloud(string blobName)
    {
        var inputBlob = _container.GetBlobClient(blobName);
        var outputBlob = _container.GetBlobClient($"processed/{blobName}");
        
        using (var inputStream = new MemoryStream())
        using (var outputStream = new MemoryStream())
        {
            // Download
            await inputBlob.DownloadToAsync(inputStream);
            inputStream.Position = 0;
            
            // Process
            using (var presentation = new Presentation(inputStream))
            {
                presentation.Save(outputStream, SaveFormat.Pptx);
            }
            
            // Upload
            outputStream.Position = 0;
            await outputBlob.UploadAsync(outputStream, overwrite: true);
        }
    }
}

using System.Diagnostics;

public class MonitoredProcessor
{
    private readonly ILogger _logger;
    private readonly IMetricsCollector _metrics;
    
    public async Task<ProcessingResult> ProcessWithMetrics(string inputFile)
    {
        var stopwatch = Stopwatch.StartNew();
        var result = new ProcessingResult { InputFile = inputFile };
        
        try
        {
            _logger.LogInformation("Starting processing: {File}", inputFile);
            
            using (var presentation = new Presentation(inputFile))
            {
                result.SlideCount = presentation.Slides.Count;
                
                // Process presentation
                presentation.Save("output.pptx", SaveFormat.Pptx);
                
                result.Success = true;
            }
            
            stopwatch.Stop();
            result.ProcessingTime = stopwatch.Elapsed;
            
            // Record metrics
            _metrics.RecordSuccess(result.ProcessingTime);
            _logger.LogInformation("Completed: {File} in {Time}ms", 
                inputFile, stopwatch.ElapsedMilliseconds);
        }
        catch (Exception ex)
        {
            stopwatch.Stop();
            result.Success = false;
            result.ErrorMessage = ex.Message;
            
            _metrics.RecordFailure();
            _logger.LogError(ex, "Failed: {File}", inputFile);
        }
        
        return result;
    }
}

using Polly;

public class ResilientProcessor
{
    private readonly IAsyncPolicy<bool> _retryPolicy;
    
    public ResilientProcessor()
    {
        _retryPolicy = Policy<bool>
            .Handle<Exception>()
            .WaitAndRetryAsync(
                retryCount: 3,
                sleepDurationProvider: attempt => TimeSpan.FromSeconds(Math.Pow(2, attempt)),
                onRetry: (exception, timeSpan, retryCount, context) =>
                {
                    Console.WriteLine($"Retry {retryCount} after {timeSpan.TotalSeconds}s");
                }
            );
    }
    
    public async Task<bool> ProcessWithRetry(string inputFile, string outputFile)
    {
        return await _retryPolicy.ExecuteAsync(async () =>
        {
            using (var presentation = new Presentation(inputFile))
            {
                await Task.Run(() => presentation.Save(outputFile, SaveFormat.Pptx));
                return true;
            }
        });
    }
}

public class MemoryOptimizedProcessor
{
    public static void ProcessLargeFile(string inputFile, string outputFile)
    {
        // Process in isolated scope
        ProcessInIsolation(inputFile, outputFile);
        
        // Force garbage collection
        GC.Collect();
        GC.WaitForPendingFinalizers();
        GC.Collect();
    }
    
    private static void ProcessInIsolation(string input, string output)
    {
        using (var presentation = new Presentation(input))
        {
            presentation.Save(output, SaveFormat.Pptx);
        }
    }
}

public class OptimizedParallelProcessor
{
    public static async Task ProcessBatch(string[] files)
    {
        // Calculate optimal parallelism
        int optimalThreads = Math.Min(
            Environment.ProcessorCount / 2,
            files.Length
        );
        
        var options = new ParallelOptions
        {
            MaxDegreeOfParallelism = optimalThreads
        };
        
        await Parallel.ForEachAsync(files, options, async (file, ct) =>
        {
            await ProcessFileAsync(file);
        });
    }
}

public class RobustProcessor
{
    public static (bool success, string error) SafeProcess(string file)
    {
        try
        {
            using (var presentation = new Presentation(file))
            {
                presentation.Save("output.pptx", SaveFormat.Pptx);
                return (true, null);
            }
        }
        catch (PptxReadException ex)
        {
            return (false, $"Corrupted file: {ex.Message}");
        }
        catch (IOException ex)
        {
            return (false, $"File access: {ex.Message}");
        }
        catch (OutOfMemoryException ex)
        {
            return (false, $"Memory limit: {ex.Message}");
        }
        catch (Exception ex)
        {
            return (false, $"Unexpected: {ex.Message}");
        }
    }
}

// ✓ Good - automatic disposal
using (var presentation = new Presentation("file.pptx"))
{
    // Process presentation
}

// ✗ Bad - manual disposal required
var presentation = new Presentation("file.pptx");
// Process presentation
presentation.Dispose(); // Easy to forget!

public class LoggingProcessor
{
    private readonly ILogger _logger;
    
    public void Process(string file)
    {
        _logger.LogInformation("Processing: {File}", file);
        
        using var activity = new Activity("ProcessPresentation");
        activity.Start();
        
        try
        {
            // Process file
            _logger.LogDebug("File size: {Size}MB", new FileInfo(file).Length / 1024 / 1024);
            
            using (var presentation = new Presentation(file))
            {
                _logger.LogDebug("Slide count: {Count}", presentation.Slides.Count);
                presentation.Save("output.pptx", SaveFormat.Pptx);
            }
            
            _logger.LogInformation("Success: {File}", file);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed: {File}", file);
            throw;
        }
        finally
        {
            activity.Stop();
            _logger.LogDebug("Duration: {Duration}ms", activity.Duration.TotalMilliseconds);
        }
    }
}